Switch connection for electric lamps.



c. L DE MARTIN. SWITCH CONNECTION FOR ELECTRIC LAMPS.

I APPLICATION FILED OCT. 9. 1916.

v 1,22 ,193, v Patented Ma 15, 1917.' f" 4; v '1 7 22 M 2 5/ I 52 /2 I Z7 2, MIN f1:

Ill/VENTOR Mara .55 A, De yawn/y ATTORNEYS CHARLES 1:. DE MARTIN, :3 AJONNERSVILLE, INDIANA, A-SSIGNOR TO INDIANA LAMP CO., OF CONNERSVILLE, INDIANA, A CORPORATION.

Specification of Letters Patent.

Patented MM 1 5, 1917.

Applicat on f ied October 9, 1916. Serial No. 124,676.

To all whom it may concern:

Be it known that I, CHARLES L. ')E MAR- TIN, a citizen of the United can i. and a resident of Connersville, county of=la vette, and State of Indiana, have invented a certain new and usefuhbwitch Connection for Electric Lamps; and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, in which like letters refer to like parts.

This invention relates to means for obtaining a suitable electric switch control for electric search lights or spot lights and is adapted to be used especially on spot lights when it is desired to have the switch control independent of the wiring.

In the common construction of such lamps the wires are introduced through the switch mechanism and handle, which makes it inconvenient to operate,' and wears out the insulation on the wiring. The construction as hereafter set forth is especially adapted to avoid this trouble and form a switch construction which can be operated without undue wearing of the insulation on the wires. Also considerable advantage 'is obtained in the operation of the switch'as it is much easier and simpler to operate than the ordinary switches now in use and the construction is such that there will be no danger of shortcircuits or of the mechanism breaking.

The full nature of this invention will be understood by the accompanying drawings and the following description and claims:

Figure 1 is a-central vertical cross section through the lamp with the contact broken. Fig. 2 is a central vertical section through the switch. mechanism with the contact made. Fig. 3 is a perspective'view of a portion, of the switch'mechanism. Fig. 4 is a cross section on line 4- 1: of Fig. 2.

In the drawings there is shown a shell of a. lamp 10, having a rim 11 and a lens 12 secured therein, a reflector 13 secured within said rim through which a socket 14 extends which carries a lamp 15, said lamp having pins in its socket for engaging recesses therein. This much of the construction is of the ordinary type of electric search light.

There is a removable insert 16 adapted to turn in the socket 14 having spring contact pins 17 of ordinary construction extending from the inner end thereof so as to engage the stem of the lamp 15 and make contact with the contact points 18 thereon, whenin a given position. This much of the con-' struction is of the ordinary type of electric switch connection which is well-known in the art. The pins 19 screw into the opposite sides of said removable insert so as to extend radially outward therefrom through the slot 20 in the socket 1% and between the prongs 21 of the switch'member 22. whereby said switch member, engaging said pins will operate the removable insert. The electric wire or cord 23 enters the shell of the lamp on the lower side as shown in Fig. 1 and is connected through the removable insert to the contact pins 17 so that when the switch member 22 is turned a quarterrevolution the removable insert is turned by means of pins 19 which move the contact points on bulb into engagement with the points 18 as shown in Fig. 2. I

In order to operate theswitch member 22 there is a screw Qet having a head with recesses 26 on opposite sides thereof. The head 25 wedges against the curved sides of the switch handle 27 and the screw 21 extends through the shell and screws into the switch 22 which is held in fixed relation thereto by a cotter pin 28 which extends through av hole in the screw and between the prongs 21. For securing the head of said screws securely to the handle there is provided a plate 29 which is punched so that it has projections 30 which extend through the recesses 26 for engaging the head 25. Said plate is secured to the handle by soldering or any other suitable means not shown so that the screw 21 is rigidly secured to the handle so that it practically forms a part thereof.

For preventing a short circuit occurring between wires 23 and the member 22 ofthe screw 21 there is provided an insulating disk 31 which has ends. projecting between the prongs 21 which hold it in position between the end of the screw and electric wires.

In making or breaking contact the han- .dle 27 is simply turned a quarter revolutionto the left or right as the case may be and as has been set forth. The construction is such that the wires 23 are independent of the outer portion of the switch so that the insulation thereon will not'become so wor-n aiid the connections loosened or hrokenso easily, while at the same time a reflecting mirror 32 may be secured by suitable means to the. end of the switch handle if desired.

The invention claimed is: 1. An electric switch connection including a socket, a lamp secured in said socket, having a contact point thereon, a removable insert in'said socket, a. contact on said insert in position to engage the contact on said lamp, a switch me'mber adapted to engage and operate said removable insert, a lamp casing, an external switch handle, and means rigidly secured to said handle and extending through said casingt'or engaging andv oper ating said switch member so as to make and breakcon'tact when'said handle is operated.

2. An electric switch connection including I a socket, a lamp'secured in said socket, having double contact points, a. removable insert in said socket, contacts on said insert adapted to engagesaid lamp, outwardly extending I pinsin said insert, a switch member adapted to. engage said p1ns,-a lamp easing, an external switch handle, and means rigidly secured i said handle and extending through said casing 'for engaging and operating said.

switch member; so as to make and break contact with said centact points when said handle is operated. Y

3. An electric switch connection including a'socket, a lamp in said socket having double contact points,'means for making and breaki g contact with said points, a switch member having abifurcated arm adapted to engage said means, and a switch handleadapted to be rigidly securedto said member whereby said member-will operateiso'as to make and break said contact when said handle is turned. I

engaging said contact points,

ber having a biturcated arm adapted to en- 1 4. An electric switch connection including a socket, a lamp in said socket havihgdouble contact points, means for engaging and disa switch memgage said means, a lamp casing, a switch handle on the outside of said casing, a screw secured to said handle and extending in wardly through said casing, and a pin extending through said screw and between the biturcated portions of said member tor caus- .ing the (operation thereof t'ormaking and breaking contact with said lamp. 5. An electric switch connection including a socket, a lamp in said socket having a double contact thereon, means for anaking and breaking contact therewithn a switch member adapted to engage said means, a lamp casing,a switch handle on the outside of said casing, a screw having an enlarged head adapted to wedge in said handle, said 'screw extending through said jcasing and engaging said means,r esses on said head, and a disk adapted to e secured thereon having inwardly pro ecting portions tor engaging said recesses so as to secure said CHARLES L. DE MARTIN. 

